What’s a tractor beam you ask? Something a fan of Star Trek (or alien movies) would recognize: a beam that pulls something towards it. What’s so cool about this? Well, scientists have created a tractor beam that actually works: on a microscopic level, for microscopic distances. The Czech Republic’s Institute of Scientific Instruments and Scotland’s University of St. Andrews have created an optical field that can drag particles towards it, as long as they’re made of the right materials.
Tractor beams in space and for the air force, anyone? Via: Nature